Hanna Instruments HI 901 - Manual (Page 87)

6-3
TITRATION MODE
6 TITRATION MODE
6.1 Titration Start
Before beginning to perform a titration make sure that the following conditions are met:
• A pump is properly installed and selected as active.
• A burette is inserted in the pump and filled with titrant.
• The aspiration tube is inserted in the titrant bottle and the dispensing tube is over
the analyte beaker.
• The electrode and the temperature probe is inserted in the analyte beaker.
• The desired method is selected as active and the parameters are set at optimum
values.
6.1.1 In Progress Titration
To start a new titration, press from the main screen.
When a titration begins:
• The stirrer will turn on (if detected and enabled).
• If the pre-stirring time option is enabled, the sample will be stirred until the
prescribed time elapses (see 5.5.6 Pre-Titration Stir Time).
• If the pre-titration volume option is enabled, the prescribed volume will be dis-
pensed (see 5.5.5 Pre-Titration Volume).
• According to the Measurement Mode and the Dosing Type option, the titrator will
start to deliver doses until the titration end point are detected or a titration stop
condition occurs.
6.1.2 Suspend Titration
While titration is in progress, you can temporarily stop it by pressing . All the titration
parameters will be frozen.
You can continue the titration by pressing .
6.1.3 On-line Graph
During a titration, both the potentiometric S-shaped curve and the selected derivative curve
(titration with equivalence point only) can be displayed on the Titration Graph screen, by
pressing
. The titration ID report is also displayed inside the graph window.